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UIKit

Introduction

The UIKit framework provides the required infrastructure for your iOS apps. It provides the core objects that you need to build apps for iOS and tvOS. You use these objects to display your content onscreen, to interact with that content, and to manage interactions with the system.

In iOS, user interface classes are not just called Button, Label TextField, and slider, but rather UIButton, UILabel, UISlider, UITextField.

You will also see things like UIColor, UITouch, UIEvent, and UIPrinter, etc.

All of this provided functionality which is bundled together into a single framework that Apple calls UIKit.